Just Keep Breathing

Summary: Sierra moved to Lima, Ohio in December and met/joined The New Directions. In February, she met The Doctor and John Watson, who took her to London. She helped them save the world and the great Sherlock Holmes before traveling back to Ohio a week and a half later. It's May 14th and she was still waiting for them to return and get her, as promised, so she could live her life with Sherlock (whom she had fallen hard for and whom she suspected had fallen for her as well).

Pairings: Sherlock Holems/OC, John Watson/The Doctor, Mycroft Holmes/ Greg Lestrade, Kurt Hummel/Blaine Anderson/ Will Schuester

Warnings: Drug abuse references, rape mentions, sex scenes, and other things

Disclaimer: I DO NOT OWN THESE CHARACTERS! I FELT LIKE MAKING A FUN CROSS OVER AND THEREFORE I AM JUST PLAYING WITH THEM! They are the properties of their respective shows and will be returned where they belong at the end of the fic. Thank you for reading!

Chapter One: Back Again

The hallways were just as she had remembered them: brick in the main hall, carpet in the classroom hallways. It was silent, something Sierra was grateful for, as The New Directions walked towards the gym. Why they were there, Sierra would never know, but they were at her former high school, national champs of the show choir competition, and about to performer for her former teachers and classmates. Sierra wasn't nervous. Well maybe she was a little bit. Her former teachers never knew she liked to sing nor did they know she could sing. She didn't care about her former classmates.

Sierra was more worried about something a friend had promised her a few months ago. The Doctor and John had promised to come get her after things in London had been settled for a bit, but that was February. It was now May 14th and here she was, still in America.

She held the hand of her best friend, Kurt Hummel, and looked at Blaine, who was holding Kurt's other hand. Everyone had that buzz of performance excitement and if asked, Sierra wouldn't lie and say she wasn't excited as well. She just wanted to leave and escape her life here. Will Schuester, their director, walked slightly behind them, and Sierra knew he was keeping an eye on his two lovers(not that anyone but Sierra knew about that part, just like they were the only three who knew about her adventure earlier in the year and what had been promised to her). She checked her phone one last time for a text from a very special someone, sighed when she saw nothing, before breaking off the main group at the small gym and headed towards the entrance to the main gym with Will. As she handed him her phone, she peaked around the door where she was meant to enter.

"Nervous Sierra?"

"No. Why should I?"

"Old school, old classmates, old teachers. That'd make anybody nervous." She shook her head before looking at Will. Will could see clearly for the first time in a while how sad and lonely she was feeling.

"Sierra, they'll be here. I promise. They'll come save you soon enough."

"I know…"

"You haven't heard from him in a while huh?"

"Not since 3 days ago. This worries me a bit."

"Well I'm sure everything is fine."

"I know." Sierra turned as the principal started to announce The New Directions. Will squeezed her shoulder before slipping in the door and moving towards the side. Sierra switched on her mic and steadied her heart beat. The group took center stage. Music began and she put a bright smile on her face. Her heels clicked on the gym floor as she walked in and paused next to her all time favorite teacher from her time here. She startled him and everyone else around her as she started to sing, eyes locked with her friends.

"So this is what you meant When you said that you were spent And now it's time to build from the bottom of the pit Right to the top Don't hold back Packing my bags and giving the academy a rain check" She turned to face her favorite teacher and locked eyes with him, nearly missing John's and The Doctor's appearance right next to Will as she sang for the one person she missed more than anyone (other than Sherlock)

"I don't ever wanna let you down I don't ever wanna leave this town 'Cause after all
This city never sleeps at night it's time to begin isn't it I get a little bit bigger but then I'll admit I'm just the same as I was why don't you understand I'm never changing who I am." Sierra ran and joined her group as Blaine took over, singing to Kurt. She couldn't believe that John and The Doctor had FINALLY come to get her. But she was so happy that the rest of the performance was a blur until the final song.

As The New Directions formed a single file line, arms linked together, Sierra looked over at John. She barely made out the words "Sherlock relapsed. He nearly OD'ed. He needs you." She nodded and through herself into the final song. It was one of her favorites and The Doctor was recording the performance on his cellphone (when did he get an iPhone!?) and sang for Sherlock.

"When heaven seems so far away and dreams are just a memory without the dark the light won't show remember that you're not alone when you watch the world just turn away and break the promises it made when love is all too hard to hold just take a breath and let it go… Woahoa-ooohhh woahoa-oooahohhhh woahoa-ooohhh just keep breathing breathing breathing"

"2am too tired to sleep when what you want's not what you need and when these walls don't feel like home remember that you're not alone. The beginning's just another end it's not too late to start again when hope is all too hard to hold just take a breath and let it go" Sierra sang her heart out with her friends, holding the hands of Blaine and Kurt as they watched the tears of inspiration reach the students' eyes. Sierra could feel herself start to break down as she thought of Sherlock and her own dark past and how this song helped save her life.

As soon as the song ended, they took their bows and ran off into the small gym, everyone laughing and rejoicing in a performance well done. Sierra took her mic off, handed it to the theatre teacher, hugged Will with a whispered explanation, gave Blaine and Kurt both a hug and a kiss on the cheek. They didn't need any explanation from her. They knew she was leaving. With quick promises to take care of each other (and Will) and promises to stay in touch, Sierra ran off. She slammed into the doors and ran down to the track where the TARDIS was waiting for her, doors opened.

As soon as she stepped into the TARDIS, she was in John's arms as The Doctor closed the doors and the TARDIS took off.

"Mycroft and Greg are with him now. He's going through major withdraw as the dosage he took was massive. He's been asking for you though."

"He's going to live right?"

"Sierra I made sure he would live." Sierra turned to The Doctor and threw herself into his arms, hugging him tight. She needed to get home to the one person who could heal her soul.